Yes, it is hard to snap great pictures of the birds in my Indian Magic Crabapple trees. The lighting is often not good enough to sharpen the focus by stepping down the aperture. This is why some of the berries are out of focus.
In the fall I trimmed the tree limbs so that I would not have many branches in the way, blocking my camera shots. This really helped me in getting better snapshots this year.

HIVE on,
Mike